Can D interface with Free Pascal?

Just curious... I had a thought that perhaps since Objective C was a replacement for Pascal on the mac. that they might have the same interface. but I'm not savvy enough with fpc to figure out how to try it.

On Thursday, 28 January 2016 at 04:26:26 UTC, Taylor Hillegeist wrote: > Just curious... I had a thought that perhaps since Objective C was a replacement for Pascal on the mac. that they might have the same interface. but I'm not savvy enough with fpc to figure out how to try it. Not directly. You can declare cdecl function on Free Pascal side and call it as extern(C).

FreeSlave: On Thursday, 28 January 2016 at 08:15:38 UTC, FreeSlave wrote: > Not directly. You can declare cdecl function on Free Pascal side and call it as extern(C). What about extern(Pascal)? https://dlang.org/spec/attribute.html#linkage Bye, bearophile

On Thursday, 28 January 2016 at 19:33:22 UTC, bearophile wrote: > FreeSlave: > > On Thursday, 28 January 2016 at 08:15:38 UTC, FreeSlave wrote: >> Not directly. You can declare cdecl function on Free Pascal side and call it as extern(C). > > What about extern(Pascal)? > https://dlang.org/spec/attribute.html#linkage > > Bye, > bearophile Cool!, I did find this little gem. but still havent gotten a hello world to work. I need to figure out which libraries i need to include for fpc dependencies.

On Thursday, 28 January 2016 at 19:49:22 UTC, Taylor Hillegeist wrote: > On Thursday, 28 January 2016 at 19:33:22 UTC, bearophile wrote: >> FreeSlave: >> >> On Thursday, 28 January 2016 at 08:15:38 UTC, FreeSlave wrote: >>> Not directly. You can declare cdecl function on Free Pascal side and call it as extern(C). >> >> What about extern(Pascal)? >> https://dlang.org/spec/attribute.html#linkage >> >> Bye, >> bearophile > > Cool!, I did find this little gem. but still havent gotten a hello world to work. I need to figure out which libraries i need to include for fpc dependencies. AFAIK, FreePascal does not use the pascal calling convention by default. If this page [1] is correct, the default convention is 'register' and can be changed to something else (like pascal or cdecl) with a command-line switch [2]. [1] http://www.freepascal.org/docs-html/prog/progse22.html [2] http://www.freepascal.org/docs-html/prog/progsu87.html

On Friday, 29 January 2016 at 01:47:11 UTC, Mike Parker wrote: > On Thursday, 28 January 2016 at 19:49:22 UTC, Taylor Hillegeist wrote: >> On Thursday, 28 January 2016 at 19:33:22 UTC, bearophile wrote: >>> FreeSlave: >>> >>> On Thursday, 28 January 2016 at 08:15:38 UTC, FreeSlave wrote: >>>> Not directly. You can declare cdecl function on Free Pascal side and call it as extern(C). >>> >>> What about extern(Pascal)? >>> https://dlang.org/spec/attribute.html#linkage >>> >>> Bye, >>> bearophile >> >> Cool!, I did find this little gem. but still havent gotten a hello world to work. I need to figure out which libraries i need to include for fpc dependencies. > > AFAIK, FreePascal does not use the pascal calling convention by default. If this page [1] is correct, the default convention is 'register' and can be changed to something else (like pascal or cdecl) with a command-line switch [2]. > > [1] http://www.freepascal.org/docs-html/prog/progse22.html > [2] http://www.freepascal.org/docs-html/prog/progsu87.html Working through a simple example. I tried the cdecl option but for some reason i can compile but when i run my Gethello it cant find the shared library in the same folder? ==================================================================== taylor@taylor-NE510:~/Projects/PASCAL$ ls Gethello Gethello.d hello.pas libhello.so taylor@taylor-NE510:~/Projects/PASCAL$ cat Gethello.d extern(C) void SubStr(); void main(){ SubStr(); } taylor@taylor-NE510:~/Projects/PASCAL$ cat hello.pas library subs; procedure SubStr(); cdecl; begin write('hello World'); end; exports SubStr; end. taylor@taylor-NE510:~/Projects/PASCAL$ nm libhello.so 0000000000003ac0 T SubStr taylor@taylor-NE510:~/Projects/PASCAL$ ./Gethello ./Gethello: error while loading shared libraries: libhello.so: cannot open shared object file: No such file or directory =======================================================================

On Saturday, 30 January 2016 at 03:43:59 UTC, Taylor Hillegeist wrote: > Working through a simple example. I tried the cdecl option but for some reason i can compile but when i run my Gethello it cant find the shared library in the same folder? > > taylor@taylor-NE510:~/Projects/PASCAL$ nm libhello.so > 0000000000003ac0 T SubStr > taylor@taylor-NE510:~/Projects/PASCAL$ ./Gethello > ./Gethello: error while loading shared libraries: libhello.so: cannot open shared object file: No such file or directory > The binary's directory is not on the system search path by default on Linux. This page [1] shows three possible solutions. [1] http://www.aimlesslygoingforward.com/2014/01/19/bundling-shared-libraries-on-linux/